Events & Talks

Perceiving Systems Talk Jim Little 19-04-2011 Tracking and Measurement in Sports Video I will survey our work on tracking and measurement, waypoints on the path to activity recognition and understanding, in sports video, highlighting some of our recent work on rectification and player tracking, not just in hockey but more recently in basketball, where we have addressed player identification both in a fully supervised and semi-supervised manner.

Perceiving Systems Talk Trevor Darrell 18-04-2011 Learning Representations for Real-world Recognition Methods for visual recognition have made dramatic strides in recent years on various online benchmarks, but performance in the real world still often falters. Classic gradient-histogram models make overly simplistic assumptions regarding image appearance statistics, both locally and globally. Recent progress suggests that new learning-based representations can improve recognition by devices that are embedded in a physical world. I'll review new methods for domain adaptation which capture the visual domain shift between environments, and improve recognition of objects in s...

Perceiving Systems Talk Stan Sclaroff 15-04-2011 Algorithms for Detection, Tracking, Analysis, and Classification of Objects and Human Actions In the first part of the talk, I will describe methods that learn a single family of detectors for object classes that exhibit large within-class variation. One common solution is to use a divide-and-conquer strategy, where the space of possible within-class variations is partitioned, and different detectors are trained for different partitions. However, these discrete partitions tend to be arbitrary in continuous spaces, and the classifiers have limited power when there are too few training samples in each subclass. To address this shortcoming, explicit feature sharing h...